EP1557582A1 - Stossdämpfungskörper für fahrzeuge - Google Patents
Stossdämpfungskörper für fahrzeuge Download PDFInfo
- Publication number
- EP1557582A1 EP1557582A1 EP03809840A EP03809840A EP1557582A1 EP 1557582 A1 EP1557582 A1 EP 1557582A1 EP 03809840 A EP03809840 A EP 03809840A EP 03809840 A EP03809840 A EP 03809840A EP 1557582 A1 EP1557582 A1 EP 1557582A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recessed
- energy absorbing
- wall
- ribs
- absorbing member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
- B60R21/0428—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the side doors or panels, e.g. displaced towards the occupants in case of a side collision
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/0472—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall characterised by comprising a damping device
- F16F9/0481—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall characterised by comprising a damping device provided in an opening to the exterior atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C2049/4805—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity by closing the mould halves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C49/4812—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity and welding opposite wall parts of the parisons or preforms to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2055/00—Use of specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of main groups B29K2023/00 - B29K2049/00, e.g. having a vinyl group, as moulding material
- B29K2055/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0089—Impact strength or toughness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3008—Instrument panels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3011—Roof linings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3014—Door linings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/302—Trim strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3023—Head-rests
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3005—Body finishings
- B29L2031/3026—Arm-rests
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7138—Shock absorbing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
- B60R2019/1866—Cellular structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/186—Additional energy absorbing means supported on bumber beams, e.g. cellular structures or material
- B60R2019/188—Blow molded structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
- B60R2021/0414—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings using energy absorbing ribs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
- B60R2021/0435—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the side or roof pillars
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0047—Measuring, indicating
Definitions
- the present invention relates to a member for absorbing an impact or the energy therefrom, provided inside a vehicle structural member such as a door, a door trim, a body side panel, a roof panel, a pillar, and a bumper, for absorbing the impact from the inside such as the collision of a passenger against the inner wall of the vehicle structural member or the impact from the outside such as the collision with another vehicle.
- a vehicle structural member such as a door, a door trim, a body side panel, a roof panel, a pillar, and a bumper, for absorbing the impact from the inside such as the collision of a passenger against the inner wall of the vehicle structural member or the impact from the outside such as the collision with another vehicle.
- Japanese Patent No. 3,313,999 discloses an energy absorbing component with a hollow double wall structure, produced by blow molding of thermoplastics, forming recessed ribs from the front surface wall and the rear surface wall with the top end parts thereof bonded with each other so as to be integrated for improving the impact absorbing property
- JP-A Japanese Patent Application Laid Open
- JP-A No. 2002-187508 discloses one comprising an interlocking rib for integrally linking a plurality of recessed ribs for improving the energy absorbing property.
- This kind of an energy absorbing member is designed to be provided inside a vehicle structural member such as a door and a body side panel. It has been found that a sufficient shock absorbing property is not obtained by merely linking a plurality of the recessed ribs integrally as shown in the official gazette of Japanese Patent Application Laid Open (JP-A) No. 2002-187508.
- the energy absorbing member for a vehicle as disclosed in the official gazette of Japanese Patent No. 3,313,999 produced by forming recessed ribs from the front surface wall and the rear surface wall with the top end parts thereof bonded with each other so as to be integrated, it is pointed out that although the shock absorbing property with respect to the stress by the impact is high, in the case the stress by the impact is applied continuously, the recessed ribs buckle so that the impact absorbing property is deteriorated remarkably so that the intended shock absorbing property is not obtained.
- the welded surface produced by forming recessed ribs from the front surface wall and the rear surface wall and welding the top end parts with each other in the blow molding process is formed by pressuring a parison in a molten state by a mold, the resin in the molten state is pushed out to the outer circumference of the bonding part so as to generate puddle as shown in FIG. 11.
- the marks a', b' denote a recessed rib, c' a bonding part, and d' a resin puddle swelling to the outside of the bonding part c'.
- a notch part is formed or the thickness of the recessed rib becomes uneven so that the shock absorbing performance of the energy absorbing member is lowered, and thus a desired shock absorbing effect cannot be obtained.
- an object of the present invention is to provide an energy absorbing member for a vehicle made of thermoplastics, capable of providing the excellent shock absorbing property, formed integrally by blow molding, having a hollow part, and a plurality of pairs of recessed ribs provided by denting a first wall and a second wall facing with each other, each toward the other side, and with the top end parts bonding with each other, wherein the recessed ribs are formed at a specific height and a specific interlocking rib is formed for integrally linking the a plurality of the recessed ribs, moreover, the pairs of the recessed ribs are formed by denting the first wall and second wall toward the other side with the top end parts thereof provided adjacently, and furthermore, a certain swelling part is formed preliminarily at the bonding part of the recessed ribs according to the parison pressuring operation.
- one embodiment of the present invention is a hollow energy absorbing member for a vehicle formed by blow molding of thermoplastics, comprising opposing first and second walls defining a hollow space, a plurality of fused pairs of recessed ribs, each fused pair comprising first and second recessed ribs, the first recessed rib is integrally molded from the first wall and having a first recessed rib end, the second recessed rib is integrally molded from the second wall and having a second recessed rib end, and the first and second recessed ribs being integrally fused at a welded surface disposed between the first and second recessed rib ends, wherein an average distance from the first wall to the welded surface is about approximately 15.0 to 45.0 mm; an average distance from the second wall to the welded surface is about approximately 15.0 to 45.0mm, and the hollow space having an average distance between the first wall and said second wall of about approximately 30.0 to 90.0 mm.
- Another embodiment of the present invention provides the energy absorbing member for a vehicle comprising an interlocking rib disposed on said first or second wall, integrally coupled to at least two of the recessed ribs.
- a further embodiment of the present invention provides the energy absorbing member for a vehicle comprising an interlocking rib has a depth of 'b' (mm) wherein 3.0 ⁇ b ⁇ ⁇ (a/0.5) where 'a' is the average distance in millimeters between said first and second walls.
- Still another embodiment of the present invention provides the energy absorbing member for a vehicle wherein the recessed ribs are disposed on a plurality of virtual straight lines 'c', the lines 'c' being oriented at an angle of about approximately 30 to 60° from line 'd', the line 'd' being a line along a row of the fused pairs of recessed ribs, the interlocking ribs being formed along at least one line 'c'.
- Still another embodiment of the present invention provides the energy absorbing member for a vehicle wherein the interlocking ribs are formed such that a total length of all the interlocking ribs is in a range of 10 to 60% with respect to a total length of all the lines 'c'.
- Even another embodiment of the present invention provides the energy absorbing member for a vehicle wherein the interlocking ribs are a recessed groove having the depth of 3.0 to 15.0(mm), and the width of 2.0 to 5.0(mm).
- An even father embodiment of the present invention provides the energy absorbing member for a vehicle further comprising a swelling part having the thickness of 0.5 to 6.0(mm) disposed in a part of the welded surface of the recessed rib end.
- Yet another embodiment of the present invention provides the energy absorbing member for a vehicle wherein the swelling part is formed in a hollow shape.
- a yet further embodiment of the present invention provides the energy absorbing member for a vehicle wherein the swelling part has a stepwise part projecting having the height of 0.5 to 1.5(mm) from the welded surface.
- Even still another embodiment of the present invention provides the energy absorbing member for a vehicle further comprising at least one unfused pair of recessed ribs having an interval of 5.0 to 18.0(mm) on average disposed between said first and second recessed rib ends.
- An even still further embodiment of the present invention provides the energy absorbing member for a vehicle wherein the fused pairs of recessed ribs comprise 50 to 80% of a total number of a sum of said fused and unfused pairs of recessed ribs.
- a still yet another embodiment of the present invention provides the energy absorbing member for a vehicle wherein the first unfused recessed rib end has a surface chosen from the group of surfaces consisting of a concave surface and a convex surface and said second unfused recessed rib end has a surface of the group not chosen by said first recessed rib.
- Yet another embodiment of the present invention provides a hollow energy absorbing member for a vehicle formed by blow molding of thermoplastics, comprising opposing first and second walls defining a hollow space, a plurality of recessed ribs integrally molded from the first wall and extending toward the second wall, the recessed ribs comprising a fused recessed rib end, the fused recessed rib ends being integrally fused to the second wall at a welded surface, and wherein a height of said recessed ribs from the first wall to the welded surface is about approximately 15.0 to 45.0 mm.
- a yet further embodiment of the present invention provides the energy absorbing member for a vehicle further comprising an interlocking rib formed in the first wall, integrally linking at least two adjacent recessed ribs having the fused recessed rib ends being integrally fused to the second wall at a welded surface, and the depth b of the interlocking rib is in a range of 3.0 ⁇ b ⁇ ⁇ (a/0.5) with the premise that a is the average interval (mm) of the first wall and the second wall.
- Still another embodiment of the present invention provides the energy absorbing member for a vehicle, wherein the recessed ribs having the fused recessed rib ends being integrally fused to the second wall at a welded surface are disposed on a virtual straight line, and the interlocking ribs are formed on the virtual straight line, such that the virtual straight line is positioned with the angle ⁇ formed with respect to the horizontal line d in a range of 30 to 60°, the interlocking ribs are a recessed groove having the depth of 3.0 to 15.0 mm, and the width of 2.0 to 5.0 mm, and the total length of all the interlocking ribs is in a range of 10 to 60% with respect to the total length of all the virtual lines.
- a still further embodiment of the present invention provides the energy absorbing member for a vehicle, wherein the recessed ribs having the fused recessed rib ends being integrally fused to the second wall at a welded surface further comprising a hollow swelling part having 0.5 to 6.0 mm thickness is formed in a part of the welded surface.
- Still another embodiment of the present invention provides the energy absorbing member for a vehicle further comprising at least one unfused recessed rib comprising an unfused recessed rib end, and an interval of 5.0 to 18.0 mm on average disposed between the unfused recessed rib end and the second wall.
- a still further embodiment of the present invention provides the energy absorbing member for a vehicle, wherein the fused recessed ribs comprise 50 to 80% of a total number comprising the sum of the fused and unfused recessed ribs.
- the reference numeral 1 denotes an energy absorbing member for a vehicle.
- the energy absorbing member for a vehicle 1 comprised of a thermoplastic resin. It is molded integrally by blow molding, and comprises a hollow part 2, and a plurality of recessed ribs 5, 6 formed by denting both a first wall 3 and a second wall 4 facing with each other, with the top end parts of the first and the second recessed ribs 5, 6 contacted with each other so as to provide a welded surface 7.
- the height from the first wall 3 to the welded surface 7 of the first recessed ribs 5 is formed to 15.0 to 45.0 mm
- the height from the second wall 4 to the welded surface 7 of the second recessed ribs 6 is formed to 15.0 to 45.0 mm.
- the energy absorbing member for a vehicle 1 comprises an interlocking rib 8 for integrally linking a plurality of adjacent recessed ribs 5.
- the interlocking rib 8 is formed on a virtual straight lines c.
- the virtual straight lines are positioned with the angle ⁇ formed with respect to the horizontal line d in a range of 30 to 60°.
- the ratio of the adjacent recessed ribs 5 formed on the virtual straight line with the interlocking ribs 8 formed is 10% to 60%.
- the depth of interlocking ribs 8 is formed in a range of 3.0 ⁇ b ⁇ ⁇ (a/0.5) where "a" is the thickness (mm) of the energy absorbing member 1, and "b” is the depth (mm) of the interlocking ribs.
- the interlocking ribs 8 are a recessed groove having the depth "b” of 3.0 to 15.0 mm, and the width of 2.0 to 5.0mm.
- the interlocking ribs 8 need to have the depth "b" (mm) thereof in a range of 3.0 ⁇ b ⁇ ⁇ (a/0.5) with respect to the thickness a of the main body.
- the interlocking ribs 8 are formed such that the total length of all the interlocking ribs is in a range of 10 to 60% with respect to the total length of all the segments virtual lines on both walls from edge to edge. In particular, it is preferable that they are formed only in one of the first wall 3 and the second wall 4, with the ratio of 25%.
- the interlocking ribs 8 are disposed only in the first wall 3, out of the 38 recessed ribs 5, 6 formed in the first wall 3 and the second wall 4 on the virtual straight line c, with the virtual straight line disposed in a range of 30 to 60° of the angle ⁇ with respect to the horizontal line d so as to link the adjacent first recessed ribs 5 with each other only in one inclination direction for 50% of those on the virtual lines. That is, out of the 56 interlocking ribs formable by the calculation, 14 interlocking ribs are formed such that the interlocking ribs 8 are formed by a 25% ratio of the total of the first and second recessed ribs 5, 6 formed on the virtual straight lines. According to an energy absorbing member shown in FIG. 6, by the same calculation, the interlocking ribs are formed by a 14.3% ratio.
- the depth b of the interlocking ribs 8 is less than 3 mm, the strength needed for constantly maintaining the posture of the recessed ribs 5 is insufficient so as to generate sideways toppling. Moreover, in the case the depth b of the interlocking ribs 8 is larger than the value of the square root of the two times of the thickness a of the energy absorbing member for a vehicle 1, the interlocking ribs 8 are contacted with the facing wall before providing full performance in the process of crushing the first and second recessed ribs 5, 6 at the time of collision so that the desired energy absorbing performance cannot be obtained.
- the interlocking ribs 8 for linking a plurality of the recessed ribs 5 is open or closed such as illustrated in the embodiment shown in FIGS. 7 and 8.
- the closed interlocking rib 8 so-called inner rib
- the inner rib is produced by temporarily forming a groove-like rib from the first wall 3 toward the hollow part 2 direction at the time of blow molding, and integrating into a plate-like rib by the blow pressure.
- the desired energy absorbing performance can be obtained by accordingly providing the interlocking rib 8 as the inner rib.
- FIGS. 9 to 11 A cross-sectional enlarged view of a pair of the recessed ribs is shown in FIGS. 9 to 11.
- a swelling part 9 is formed integrally, with a hollow part 10 formed in the swelling part 9.
- the swelling part 9 formed on the welded surface 7 of the first and second recessed ribs 5, 6 may be formed as a stepwise fashion 17 with both end parts of the welded surface 7 projecting as shown in FIG. 10.
- FIGS. 17 and 18 show a blow molding step for forming the swelling part 9.
- the reference numerals 11, 11 denote a pair of split mold halves, 12, 12 denote cavities, and 13, 13 denote recessed rib forming parts.
- One of the recessed rib forming parts, 13, 13 has a swelling part forming member 14.
- the reference numeral 15 denotes a parison, and 16 an extrusion head.
- the parison 15 As shown in FIG. 17, by disposing the parison 15 between the pair of the split mold halves 11, 11, closing the mold as shown in FIG. 18, and blowing a pressurized fluid into the parison 15 for blow molding, the pressed resin flows into the swelling part forming part 14 so as to form the swelling part 9 on the welded surface 7 to be formed by being pressed by the top end surfaces of the recessed rib forming parts 13, 13.
- the waste of the resin to the outer circumference of the welded surface 7 can be prevented according to the influx to the swelling part forming part 14 of the flowing resin pressed by the top end surfaces of the recessed rib forming parts 13, 13, the resin puddle is not generated on the outer circumference of the welded surface 7 so that the thickness irregularity is not generated in the welded surface 7 as well.
- the stepwise parts 17 shown in FIG. 10 can be formed.
- the swelling part 9 projecting stepwise from the welded surface toward the first wall 3 or the second wall 4, with the height thereof in a range of 0.5 to 6.0 mm in the recessed rib 20 axis direction, generation of the resin puddle on the outer circumference of the bonding part can be prevented preferably. Furthermore, by forming the hollow part 10 in the swelling part 9, the thickness of the welded surface 7 can be formed evenly so that an energy absorbing member having the stable energy absorbing property can be formed.
- the energy absorbing member for a vehicle 1 comprises at least one pair of recessed ribs 20 having a welded surface 7 with the top end parts of the first recessed rib 5 and second side rib 6 welded and integrated, and at least one pair of recessed ribs 19 having an interval 18 of 5.0 to 18.0 mm on average with the top end parts of the first recessed rib and the second recessed rib adjacent with each other.
- the recessed ribs 20 having the welded surface 7, the fused ribs are about approximately 50 to 80% with respect to the total number of the recessed ribs.
- some ribs are configured such that the rib from the first wall is separated from its corresponding rib from the second wall by an interval. Such a configuration generally occurs in about approximately 50 to 20% of the ribs in a component.
- the facing interval of the top end parts of the recessed ribs 19 having the interval with the top end parts provided adjacently is preferably 5.0 to 18.0 mm on average.
- one of the pair of the recessed ribs 19 having the interval 18 with the top end parts provided adjacently has the top end part formed as a concave surface part 21, and the other one has the top end part formed as a convex surface part 22, respectively.
- the top end parts by forming the top end parts accordingly, in the state with the recessed ribs 5, 6 deformed by receiving the impact so as to have the top end parts thereof contacted with each other, displacement with each other can be prevented so that the energy absorbing property of the energy absorbing member for a vehicle 1 can further be improved.
- the concave and convex surfaces of the recessed ribs 5, 6 may be provided in any mating fashion.
- the energy absorbing member for a vehicle 1 according to the invention is blow molded as shown in FIGS. 15 and 16.
- the reference numerals 11, 11 are a pair of split mold halves.
- the split mold halves 11, 11 are provided with recessed rib forming parts 13, 13 for forming the recessed ribs 5, 6.
- the reference numeral 15 denotes a parison, and 16 an extrusion head.
- thermoplastic resin for providing the energy absorbing member for a vehicle 1 according to the invention a resin having large mechanical strength and high degree of rigidity can be used.
- a resin having large mechanical strength and high degree of rigidity examples thereof include a polyolefin resin such as a high density polyethylene resin and a polypropylene resin, a styrene resin such as a polystyrene resin, an acrylonitrile-butadiene-styrene copolymer (ABS resin), an acrylonitrile-styrene resin (AS resin) and an acrylonitrile-acrylic rubber-styrene copolymer (AAS resin), a polyester resin such as a polyethylene terephthalate, a polycarbonate resin, a polyamide resin, a polyphenylene ether resin (PPO resin), and a blended composite thereof.
- a polyolefin resin such as a high density polyethylene resin and a polypropylene resin
- ABS resin acrylon
- the energy absorbing member for a vehicle 1 according to the invention is provided inside a vehicle structural member such as a door of, a door trim, a body side panel, a roof panel, a pillar, a bumper, or the like.
- FIG. 19 shows an embodiment of providing the energy absorbing member for a vehicle 1 according to the invention inside a door trim 24 of a door 23
- FIG. 20 shows an embodiment of providing the same inside a rear pillar 25 of an automobile
- FIG. 21 shows an embodiment of providing the same inside a rear bumper 26
- FIG. 22 shows an embodiment of providing the same between a bumper fascia 27 and a bumper beam 28 of an automobile bumper.
- the mark A denotes the head of a passenger.
- FIG. 23 illustrates an energy absorbing member for a vehicle 1 according to one embodiment of the present invention which comprises the recessed rib 5 provided by denting the first wall 3 toward the facing second wall 4.
- FIG. 24 shows an enlarged cross-sectional view taken on the line C-C of FIG. 23, which illustrates an energy absorbing member 1 according to one embodiment of the present invention.
- the impact absorbing member for a vehicle according to the invention can be used preferably as a member for absorbing the impact of the collision, or the like by being disposed inside a vehicle structural member such as a door, a door trim, a body side panel, a roof panel, a pillar, a bumper, a seat, and an instrument panel of an automobile, or the like.
- a vehicle structural member such as a door, a door trim, a body side panel, a roof panel, a pillar, a bumper, a seat, and an instrument panel of an automobile, or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Body Structure For Vehicles (AREA)
- Vibration Dampers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Applications Claiming Priority (29)
Application Number | Priority Date | Filing Date | Title |
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JP2002319161A JP2004149075A (ja) | 2002-10-31 | 2002-10-31 | 車両用衝撃吸収体 |
JP2002319162 | 2002-10-31 | ||
JP2002319160 | 2002-10-31 | ||
JP2002319162A JP4229676B2 (ja) | 2002-10-31 | 2002-10-31 | 車両用衝撃吸収体 |
JP2002319160A JP2004149074A (ja) | 2002-10-31 | 2002-10-31 | 車両用衝撃吸収体 |
JP2002319163A JP4181630B2 (ja) | 2002-10-31 | 2002-10-31 | 車両用衝撃吸収体 |
JP2002319163 | 2002-10-31 | ||
JP2002319161 | 2002-10-31 | ||
JP2003025257A JP2004231144A (ja) | 2003-01-31 | 2003-01-31 | 車両用衝撃吸収体 |
JP2003025258 | 2003-01-31 | ||
JP2003025254A JP2004232827A (ja) | 2003-01-31 | 2003-01-31 | 車両用衝撃吸収体 |
JP2003025258A JP2004231145A (ja) | 2003-01-31 | 2003-01-31 | 車両用衝撃吸収体 |
JP2003025255 | 2003-01-31 | ||
JP2003025256 | 2003-01-31 | ||
JP2003025255A JP4220795B2 (ja) | 2003-01-31 | 2003-01-31 | 車両用衝撃吸収体 |
JP2003025257 | 2003-01-31 | ||
JP2003025256A JP2004231143A (ja) | 2003-01-31 | 2003-01-31 | 車両用衝撃吸収体 |
JP2003025254 | 2003-01-31 | ||
JP2003054857 | 2003-02-28 | ||
JP2003054858A JP2004262343A (ja) | 2003-02-28 | 2003-02-28 | 車両用衝撃吸収体 |
JP2003054858 | 2003-02-28 | ||
JP2003054856A JP4181631B2 (ja) | 2003-02-28 | 2003-02-28 | 車両用衝撃吸収体 |
JP2003054857 | 2003-02-28 | ||
JP2003054856 | 2003-02-28 | ||
JP2003097349A JP4271476B2 (ja) | 2003-02-28 | 2003-03-31 | 車両用衝撃吸収体 |
JP2003097349 | 2003-03-31 | ||
JP2003135249 | 2003-05-14 | ||
JP2003135249 | 2003-05-14 | ||
PCT/JP2003/010011 WO2004040161A1 (ja) | 2002-10-31 | 2003-08-06 | 車両用衝撃吸収体 |
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EP1557582A1 true EP1557582A1 (de) | 2005-07-27 |
EP1557582A4 EP1557582A4 (de) | 2006-05-24 |
EP1557582B1 EP1557582B1 (de) | 2012-02-29 |
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EP03809842A Expired - Lifetime EP1557583B1 (de) | 2002-10-31 | 2003-08-06 | Stossdämpfer für fahrzeug |
EP03809840A Expired - Lifetime EP1557582B1 (de) | 2002-10-31 | 2003-08-06 | Stossdämpfungskörper für fahrzeuge |
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EP03809842A Expired - Lifetime EP1557583B1 (de) | 2002-10-31 | 2003-08-06 | Stossdämpfer für fahrzeug |
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US (6) | US20040129518A1 (de) |
EP (2) | EP1557583B1 (de) |
AT (2) | ATE547647T1 (de) |
AU (3) | AU2003254828A1 (de) |
CA (2) | CA2504485C (de) |
WO (3) | WO2004040162A1 (de) |
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JP4427849B2 (ja) * | 1999-11-25 | 2010-03-10 | 株式会社カネカ | 耐衝撃性に優れた車両用内装材 |
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JP4584444B2 (ja) | 2000-12-19 | 2010-11-24 | キョーラク株式会社 | 自動車の衝撃吸収部材 |
JP2002120681A (ja) * | 2000-08-07 | 2002-04-23 | Kanegafuchi Chem Ind Co Ltd | 車両用内装部材 |
FR2815100B1 (fr) * | 2000-10-09 | 2003-04-18 | Sai Automotive Allibert Ind | Dispositif d'absorption d'energie lors d'un choc, et portiere de vehicule automobile comprenant un tel dispositif |
JP2002201322A (ja) | 2000-12-28 | 2002-07-19 | Idemitsu Petrochem Co Ltd | ポリプロピレン樹脂組成物 |
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-
2003
- 2003-08-06 AU AU2003254828A patent/AU2003254828A1/en not_active Abandoned
- 2003-08-06 EP EP03809842A patent/EP1557583B1/de not_active Expired - Lifetime
- 2003-08-06 WO PCT/JP2003/010012 patent/WO2004040162A1/ja active Application Filing
- 2003-08-06 CA CA2504485A patent/CA2504485C/en not_active Expired - Lifetime
- 2003-08-06 WO PCT/JP2003/010013 patent/WO2004040163A1/ja active Application Filing
- 2003-08-06 AU AU2003254829A patent/AU2003254829A1/en not_active Abandoned
- 2003-08-06 EP EP03809840A patent/EP1557582B1/de not_active Expired - Lifetime
- 2003-08-06 CA CA2504490A patent/CA2504490C/en not_active Expired - Fee Related
- 2003-08-06 AT AT03809840T patent/ATE547647T1/de active
- 2003-08-06 WO PCT/JP2003/010011 patent/WO2004040161A1/ja active Application Filing
- 2003-08-06 AT AT03809842T patent/ATE475031T1/de not_active IP Right Cessation
- 2003-08-06 AU AU2003257809A patent/AU2003257809A1/en not_active Abandoned
- 2003-10-31 US US10/698,537 patent/US20040129518A1/en not_active Abandoned
- 2003-10-31 US US10/698,706 patent/US7111713B2/en not_active Expired - Lifetime
- 2003-10-31 US US10/698,314 patent/US7143876B2/en not_active Expired - Lifetime
-
2005
- 2005-05-17 US US11/130,616 patent/US7306080B2/en not_active Expired - Lifetime
- 2005-11-28 US US11/287,984 patent/US7178647B2/en not_active Expired - Lifetime
-
2006
- 2006-05-08 US US11/430,287 patent/US7306081B2/en not_active Expired - Lifetime
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JPH031925A (ja) * | 1989-05-30 | 1991-01-08 | Kyoraku Co Ltd | リブ付き中空パネルおよびその製造方法 |
EP1172260A2 (de) * | 2000-07-14 | 2002-01-16 | Kyoraku Co., Ltd. | Fahrzeugstossstange |
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Title |
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PATENT ABSTRACTS OF JAPAN vol. 015, no. 105 (M-1092), 13 March 1991 (1991-03-13) -& JP 03 001925 A (KYORAKU CO LTD), 8 January 1991 (1991-01-08) * |
See also references of WO2004040161A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8915536B2 (en) | 2010-05-28 | 2014-12-23 | Kyoraku Co., Ltd. | Impact absorbing member and method of manufacturing the same |
Also Published As
Publication number | Publication date |
---|---|
EP1557583B1 (de) | 2010-07-21 |
EP1557583A1 (de) | 2005-07-27 |
AU2003257809A1 (en) | 2004-05-25 |
US7306081B2 (en) | 2007-12-11 |
EP1557583A4 (de) | 2006-07-12 |
US20040129518A1 (en) | 2004-07-08 |
US20040124572A1 (en) | 2004-07-01 |
CA2504485C (en) | 2011-03-22 |
CA2504485A1 (en) | 2004-05-13 |
CA2504490C (en) | 2011-05-03 |
CA2504490A1 (en) | 2004-05-13 |
US20040195064A1 (en) | 2004-10-07 |
US20060220290A1 (en) | 2006-10-05 |
US7111713B2 (en) | 2006-09-26 |
AU2003254829A1 (en) | 2004-05-25 |
US7306080B2 (en) | 2007-12-11 |
EP1557582A4 (de) | 2006-05-24 |
WO2004040163A1 (ja) | 2004-05-13 |
AU2003254828A1 (en) | 2004-05-25 |
WO2004040161A1 (ja) | 2004-05-13 |
US7143876B2 (en) | 2006-12-05 |
EP1557582B1 (de) | 2012-02-29 |
US7178647B2 (en) | 2007-02-20 |
US20050230204A1 (en) | 2005-10-20 |
WO2004040162A1 (ja) | 2004-05-13 |
ATE547647T1 (de) | 2012-03-15 |
US20060076202A1 (en) | 2006-04-13 |
ATE475031T1 (de) | 2010-08-15 |
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